# Precaliber 12 12 Viper Red

Precaliber 12 is the perfect first bike for little riders who are ahead of the curve and ready for two wheels at a younger age than most. It has a handle built into the saddle so you can guide them as they ride, and tool-free training wheels that are super easy to install and remove. It's a great fit for kids ages 3-4, between 36-40˝ tall.

-   This bike is a memory-maker: seeing your child ride their bike for the first time is something you'll never forget
-   This bike is hand-me-down heaven: it's built to last, so younger siblings can inherit this bike and it'll still feel like new
-   Investing in a kids' bike from an established bike brand is worth it—Trek kids' bikes are designed and assembled by people who know bikes
-   Like all Precaliber bikes, the frame is lower so it's easier for kids to stand over and hop on and off

  

### Integrated handle

Hidden handle under the saddle helps you guide your child while they learn to ride.

![](https://media.trekbikes.com/image/upload/Feature_Kids_seat_handle2-1.jpg)

### Toolless training wheels

When your little one is ready to ditch the training wheels, the only tools you'll need are your hands.

![](https://media.trekbikes.com/image/upload/Feature_kids_tool_free_training_1.jpg)

### A better way to produce aluminum

Starting in 2024, we began removing high-emission aluminum from our manufacturing and replacing it with low-emission aluminum made with renewable energy. By October 2025, nearly every alloy bike we make - this one included - had made the switch, driving a major drop in our footprint.

![](https://media.trekbikes.com/image/upload/Alpha-Next-tech-feature.jpg)

### Upgrade your pedals and love your bike more

Pedals are two of the five touchpoints that connect you with your bike, and even though this bike comes with a pair, upgrading to pedals that boost control and grip will greatly improve your ride. See the pedal guide and find the best pedals for your riding style. We recommend flat pedals for simple versatility.

![](https://media.trekbikes.com/image/upload/TK23_Kovee_Line_Pedals_Tech_Features_Primary_13_Upgrade_your_pedals.jpg)  

Frame

Alpha Silver Aluminum, 12'' kids' frame size

Fork

Steel, 12'', threadless 1'' steerer

Tire

Bontrager XR1, wire bead, 27 tpi., 12x2.25''

Hub Front

Steel, 84mm bolt-on

Hub Rear

Coaster brake, 16T, 120mm bolt-on

Rim

Alloy 12'', 20-hole, schrader valve

Crank

Alloy, 24T steel ring, chainguard, 70mm length

Bottom Bracket

Square taper, 68mm, sealed cartridge

Chain

HV410, 1/2x1/8

Pedal

Kids' Satellite, 9/16 thread

Saddle

Kids' padded, integrated seatpost, with handle

Handlebar

Kids' steel, 25.4mm clamp, 80mm rise, 500mm width

Stem

Bontrager Approved alloy, 25.4mm clamp, 15 degree rise, 50mm

Headset

Adjustable ball bearing

Grips

Kids' grip, 107mm width

  

### Geometry Chart

B B Drop

0.5

B B Height

16.2

Chainstay Length

24.3

Eff Top Tube

36.5

Frame Reach

26

Frame Size Letter

12"

Frame Stack

44.1

Head Angle

70.0°

Head Tube Length

8

Offset

2.5

Seat Tube

17.5

Seat Tube Angle

69.5°

Standover

34.3

Trail

3.4

Wheelbase

62.9

Wheel Size

12" kids'

## Details

- **Price:** 299.99 USD
- **Vendor:** Gio's Outdoors
- **Type:** Bicycle
- **Tags:** Gio's Outdoors, Shopify Collective

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 299.99 USD | In stock |

## Images

- Precaliber 12 12 Viper Red

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> Source: [Smart supply deals](https://smartsupplydeals.com/products/precaliber-12-12-viper-red)
> Updated: 2026-07-22